Recent answers to No Saving or Restoring of Windows and Tabs, Even With All Add-ons Disabled, Unless I Restart in Safe Modehttps://support.mozilla.org/en-US/questions/13224452021-01-20T14:19:05-08:00Make sure you do not run Firefox in permanent Private Browsing mode (Always use Private Browsing mod2021-01-20T14:19:05-08:00cor-elhttps://support.mozilla.org/en-US/questions/1322445#answer-1385748<p>Make sure you do not run Firefox in permanent Private Browsing mode (Always use Private Browsing mode; Never Remember History).
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<ul><li><a href="https://support.mozilla.org/en-US/kb/private-browsing-use-firefox-without-history" rel="nofollow">https://support.mozilla.org/en-US/kb/private-browsing-use-firefox-without-history</a>
</li><li><a href="https://support.mozilla.org/en-US/kb/common-myths-about-private-browsing" rel="nofollow">https://support.mozilla.org/en-US/kb/common-myths-about-private-browsing</a>
</li></ul>
<ul><li>Options/Preferences -&gt; Privacy &amp; Security<br>Firefox will: "Use custom settings for history"
</li><li>remove checkmark: [ ] "Always use Private Browsing mode"
</li></ul>
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<p>In case you use "Clear history when Firefox closes" or otherwise clear history.
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<ul><li>do not clear the Browsing History
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<ul><li>Options/Preferences -&gt; Privacy &amp; Security<br>Firefox will: "Use custom settings for history":<br>[X] "Clear history when Firefox closes" -&gt; Settings
</li><li><a href="https://support.mozilla.org/en-US/kb/delete-browsing-search-download-history-firefox" rel="nofollow">https://support.mozilla.org/en-US/kb/delete-browsing-search-download-history-firefox</a>
</li></ul>
<ul><li>clearing "Site Preferences" clears exceptions for cookies, images, pop-up windows, and software installation and exceptions for passwords and other website specific data
</li><li>clearing "Cookies" will remove all cookies including cookies with an allow exception you may want to keep
</li></ul>Your issue could be related to a corrupted xulstore.json file. See, for example, this article on th2021-01-20T10:39:24-08:00auckldrhttps://support.mozilla.org/en-US/questions/1322445#answer-1385706<p>Your issue could be related to a corrupted xulstore.json file. See, for example, this article on this site: [<a href="https://support.mozilla.org/en-US/kb/changes-toolbars-and-window-sizes-are-not-saved|https://support.mozilla.org/en-US/kb/changes-toolbars-and-window-sizes-are-not-saved" rel="nofollow">https://support.mozilla.org/en-US/kb/.../changes-toolbars-and-window-sizes-are-not-saved</a>]
</p>Use these links to create a new profile.
Use this new profile as is. Is the problem still t2021-01-20T10:36:35-08:00fredmcd-hotmailhttps://support.mozilla.org/en-US/questions/1322445#answer-1385703<p>Use these links to create a new profile&#46;
Use this new profile <strong>as is&#46; </strong> Is the problem still there?
</p><p>https://support&#46;mozilla&#46;org/en-US/kb/how-run-firefox-when-profile-missing-inaccessible
</p><p>http://kb&#46;mozillazine&#46;org/Profile_folder_-_Firefox#Navigating_to_the_profile_folder
</p><p>https://support&#46;mozilla&#46;org/en-US/kb/profile-manager-create-and-remove-firefox-profiles
</p><p>https://support&#46;mozilla&#46;org/en-US/kb/back-and-restore-information-firefox-profiles
</p><p><br>
Type <strong>about:profiles</strong>&lt;enter&gt; in the address bar&#46;
</p>Thank you.
I did all as you instructed, but when I restart FF, again, the previous session still do2021-01-20T04:40:06-08:00seacleerhttps://support.mozilla.org/en-US/questions/1322445#answer-1385612<p>Thank you.
</p><p>I did all as you instructed, but when I restart FF, again, the previous session still doesn't come up, and doesn't show anywhere to let me restore it, and Recently Closed Tabs and Recently Closed Windows are grey, although these files do indeed have the previous sessions in them.
</p><p>So how do I get the browser to work properly and connect with and open its Previous Sessions?
</p><p>Should I completely delete it and reinstall?
</p>You may have corrupt sessionstore [v56] sessionstore.jsonlz4 file(s).
Delete all sessionstore* file2021-01-19T06:46:12-08:00fredmcd-hotmailhttps://support.mozilla.org/en-US/questions/1322445#answer-1385304<p>You may have corrupt <strong>sessionstore</strong> [v56] <strong>sessionstore.jsonlz4</strong> file(s).
Delete all <strong>sessionstore*</strong> files and the <strong>sessionstore-backups</strong> folder.
</p><p>Type <strong>about:support</strong>&lt;enter&gt; in the address bar.
</p><p>Under the page logo on the left side, you will see
<strong>Application Basics. </strong> Under this find <strong>Profile Folder. </strong>
To its right press the button <strong>Show Folder. </strong> This will
open your file browser to the current
Firefox profile. Now <strong>Close Firefox. </strong>
</p><p>Windows: Show Folder; Linux: Open Directory; Mac: Show in Finder
</p><p><strong>Linux: </strong> Under the page logo on the left side,
you will see <strong>Application Basics.</strong> Under this find
<strong>Profile Directory. </strong> To its right press the button
<strong>Open Directory. </strong>
</p><p>Locate the above file. Then rename or delete it.
Restart Firefox.
</p><p><br>
<strong>Don't delete the files</strong> if you need to rescue any data from
them, just move them out of the profile folder to some
location where Firefox doesn't look for them. You can
try to read out their contents using this tool:
<a href="https://www.jeffersonscher.com/res/scrounger.html" rel="nofollow">https://www.jeffersonscher.com/res/scrounger.html</a>
</p>